نتایج جستجو برای: mlem algorithm

تعداد نتایج: 754023  

Journal: :journal of mathematical modeling 2014
huamin zhang hongcai yin rui ding

in this paper, we present a numerical algorithm for solving matrix equations $(a otimes b)x = f$  by extending the well-known gaussian elimination for $ax = b$. the proposed algorithm has a high computational efficiency. two numerical examples are provided to show the effectiveness of the proposed algorithm.

Journal: :iranian journal of oil & gas science and technology 2015
saeed mahmoodpour mohsen masihi sajjad gholinejhad

the mathematical modeling of fracture networks is critical for the exploration and development ofnatural resources. fractures can help the production of petroleum, water, and geothermal energy. theyalso greatly influence the drainage and production of methane gas from coal beds. orientation andspatial distribution of fractures in rocks are important factors in controlling fluid flow. the object...

Journal: :journal of operation and automation in power engineering 2007
m. darabian s. jalilzadeh m. azari

this paper focuses on multi-objective designing of multi-machine thyristor controlled series compensator (tcsc) using strength pareto evolutionary algorithm (spea). the tcsc parameters designing problem is converted to an optimization problem with the multi-objective function including the desired damping factor and the desired damping ratio of the power system modes, which is solved by a spea ...

Journal: :journal of advances in computer research 2013
sedigheh navaezadeh iman zangeneh mehnoosh vahebi

every year, with regard to rapid development of data, grid computing that is a kind of distributed computing system is that it has attracted the attention of most people and considerably taken into account. computing that cannot be done by huge computers can be performed by grid computing. if load balance is used, efficiency will increase in grid. resources have an important and effective role ...

Journal: :the modares journal of electrical engineering 2016
h. adaminejad i. shayegani m. ohammadi e. farjah

since it is essential to deliver smoothed sinusoidal voltage to the customers, diagnosing power quality (pq) events has played important role in power delivery and conversion. this diagnostic scheme should be accurate to classify pq events from other events in power system. also it should be fast enough to rapidly mitigate pq events. in this paper, an algorithm based on core vector machine (cvm...

Journal: :journal of optimization in industrial engineering 2014
hani pourvaziri parham azimi

a facility layout problem is concerned with determining the best position of departments, cells, or machines on the plant. an efficient layout contributes to the overall efficiency of operations. it’s been proved that, when system characteristics change, it can cause a significant increase in material handling cost. consequently, the efficiency of the current layout decreases or is lost and it ...

Journal: :global analysis and discrete mathematics 0
zahra khorsand islamic azad university, damghan branch, damghan, iran reza mortazavi school of engineering, damghan university, damghan, iran

with the rapid expansion of the information on the internet, recommender systems play an important role in terms of trade and research. recommender systems try to guess the user's way of thinking, using the in-formation of user's behavior or similar users and their views, to discover and then propose a product which is the most appropriate and closest product of user's interest. ...

Journal: :bulletin of the iranian mathematical society 0
m. a. yaghoobi department of applied mathematics‎, ‎faculty of mathematics and computer‎, ‎shahid bahonar university of kerman‎, ‎kerman‎, ‎iran. a. h. dehmiry department of applied mathematics‎, ‎faculty of mathematics and computer‎, ‎shahid bahonar university of kerman‎, ‎kerman‎, ‎iran.

here‎, ‎we aim to develop a new algorithm for solving a multiobjective linear programming problem‎. ‎the algorithm is to obtain a solution which approximately meets the decision maker's preferences‎. ‎it is proved that the proposed algorithm always converges to a weak efficient solution and at times converges to an efficient solution‎. ‎numerical examples and a simulation study are used to...

Journal: :international journal of advanced design and manufacturing technology 0
hossein towsyfyan department of mechanical engineering, university of huddersfield, uk seyed adnan adnani salehi institute of standard and industrial research of khorramshahr, khouzestan, iran. r. rashidian department of computer engineering, islamic azad university, khoramabad, iran

the imperialist competitive algorithm (ica) that was recently introduced has shown its good performance in optimization problems. this algorithm is inspired by competition mechanism among imperialists and colonies, in contrast to evolutionary algorithms. this paper presents optimization of bead geometry in welding process using of ica. therefore, two case studies from literature are presented t...

Journal: :journal of sciences islamic republic of iran 0

a parallel algorithm for generating t-ary tree sequences in reverse b-order is presented. the algorithm generates t-ary trees by 0-1 sequences, and each 0-1 sequences is generated in constant average time o(1). the algorithm is executed on a crew sm simd model, and is adaptive and cost-optimal. prior to the discussion of the parallel algorithm a new sequential generation with o(1) average time ...

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